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Questions and Answers
What is the primary function of the circulatory system?
What is the primary function of the circulatory system?
Which chamber of the heart receives deoxygenated blood from the body?
Which chamber of the heart receives deoxygenated blood from the body?
What type of blood vessel carries oxygenated blood away from the heart?
What type of blood vessel carries oxygenated blood away from the heart?
What are the three main components of blood?
What are the three main components of blood?
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What is the purpose of one-way valves in veins?
What is the purpose of one-way valves in veins?
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Which type of blood cell is responsible for carrying oxygen to cells?
Which type of blood cell is responsible for carrying oxygen to cells?
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What is the pathway of deoxygenated blood from the body to the heart?
What is the pathway of deoxygenated blood from the body to the heart?
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Which type of artery is able to stretch to accommodate changes in blood pressure?
Which type of artery is able to stretch to accommodate changes in blood pressure?
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What is the term for the circulation of blood from the heart to the lungs and back to the heart?
What is the term for the circulation of blood from the heart to the lungs and back to the heart?
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What is the primary function of platelets in the blood?
What is the primary function of platelets in the blood?
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Study Notes
Circulatory System
Overview
- Also known as the cardiovascular system
- Responsible for transporting oxygen and nutrients to cells and removing waste products
- Consists of heart, blood vessels, and blood
Heart
- Muscular organ that pumps blood throughout the body
- Located in the thoracic cavity, between the lungs
- Divided into four chambers:
- Right atrium (receives deoxygenated blood from the body)
- Right ventricle (pumps blood to the lungs)
- Left atrium (receives oxygenated blood from the lungs)
- Left ventricle (pumps blood to the rest of the body)
Blood Vessels
- Arteries:
- Carry oxygenated blood away from the heart
- Thicker walls to withstand higher blood pressure
- Divided into:
- Elastic arteries (e.g., aorta)
- Muscular arteries (e.g., brachial artery)
- Veins:
- Carry deoxygenated blood towards the heart
- Thinner walls, less muscular
- Contain one-way valves to prevent backflow
- Capillaries:
- Tiny vessels where oxygen and nutrients are exchanged with cells
- Walls are thin and permeable
Blood
- Liquid tissue that transports:
- Oxygen from lungs to cells
- Nutrients from digestive system to cells
- Waste products from cells to excretory organs
- Composition:
- Plasma (liquid portion)
- Formed elements (cells and cell fragments):
- Red blood cells (RBCs, carry oxygen)
- White blood cells (WBCs, part of immune system)
- Platelets (involved in blood clotting)
Blood Circulation
- Pulmonary circulation:
- Deoxygenated blood from heart to lungs (right ventricle)
- Oxygenated blood from lungs to heart (left atrium)
- Systemic circulation:
- Oxygenated blood from heart to body (left ventricle)
- Deoxygenated blood from body to heart (right atrium)
Circulatory System
- Also known as the cardiovascular system
- Responsible for transporting oxygen and nutrients to cells and removing waste products
Heart
- Muscular organ that pumps blood throughout the body
- Located in the thoracic cavity, between the lungs
- Divided into four chambers:
- Right atrium: receives deoxygenated blood from the body
- Right ventricle: pumps blood to the lungs
- Left atrium: receives oxygenated blood from the lungs
- Left ventricle: pumps blood to the rest of the body
Blood Vessels
- Arteries:
- Carry oxygenated blood away from the heart
- Thicker walls to withstand higher blood pressure
- Divided into:
- Elastic arteries (e.g., aorta)
- Muscular arteries (e.g., brachial artery)
- Veins:
- Carry deoxygenated blood towards the heart
- Thinner walls, less muscular
- Contain one-way valves to prevent backflow
- Capillaries:
- Tiny vessels where oxygen and nutrients are exchanged with cells
- Walls are thin and permeable
Blood
- Liquid tissue that transports:
- Oxygen from lungs to cells
- Nutrients from digestive system to cells
- Waste products from cells to excretory organs
- Composition:
- Plasma (liquid portion)
- Formed elements (cells and cell fragments):
- Red blood cells (RBCs, carry oxygen)
- White blood cells (WBCs, part of immune system)
- Platelets (involved in blood clotting)
Blood Circulation
- Pulmonary circulation:
- Deoxygenated blood from heart to lungs (right ventricle)
- Oxygenated blood from lungs to heart (left atrium)
- Systemic circulation:
- Oxygenated blood from heart to body (left ventricle)
- Deoxygenated blood from body to heart (right atrium)
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Description
Explore the circulatory system, responsible for transporting oxygen and nutrients to cells, and learn about the heart, blood vessels, and blood.
